Backport commit 430eb2f85 from Emacs

* lisp/org.el (org-org-menu, org-create-customize-menu):
Remove Emacs 20 compat code.

Remove Emacs 20 compat code from org.el
430eb2f850b26f7df8473de4d929b5665673a0a2
Stefan Kangas
Fri Nov 20 16:11:33 2020 +0100

lisp/org.el

@@ -18196,8 +18196,7 @@ an argument, unconditionally call `org-insert-heading'."
     ("Customize"
      ["Browse Org Group" org-customize t]
      "--"
-     ["Expand This Menu" org-create-customize-menu
-      (fboundp 'customize-menu-create)])
+     ["Expand This Menu" org-create-customize-menu t])
     ["Send bug report" org-submit-bug-report t]
     "--"
     ("Refresh/Reload"
@@ -18443,20 +18442,17 @@ With prefix arg UNCOMPILED, load the uncompiled versions."
   (interactive)
   (org-load-modules-maybe)
   (org-require-autoloaded-modules)
-  (if (fboundp 'customize-menu-create)
-      (progn
-	(easy-menu-change
-	 '("Org") "Customize"
-	 `(["Browse Org group" org-customize t]
-	   "--"
-	   ,(customize-menu-create 'org)
-	   ["Set" Custom-set t]
-	   ["Save" Custom-save t]
-	   ["Reset to Current" Custom-reset-current t]
-	   ["Reset to Saved" Custom-reset-saved t]
-	   ["Reset to Standard Settings" Custom-reset-standard t]))
-	(message "\"Org\"-menu now contains full customization menu"))
-    (error "Cannot expand menu (outdated version of cus-edit.el)")))
+  (easy-menu-change
+   '("Org") "Customize"
+   `(["Browse Org group" org-customize t]
+     "--"
+     ,(customize-menu-create 'org)
+     ["Set" Custom-set t]
+     ["Save" Custom-save t]
+     ["Reset to Current" Custom-reset-current t]
+     ["Reset to Saved" Custom-reset-saved t]
+     ["Reset to Standard Settings" Custom-reset-standard t]))
+  (message "\"Org\"-menu now contains full customization menu"))
 
 ;;;; Miscellaneous stuff